Coresight ETF trace dump failed in Juno r1 with 4.8-rc8

[Sudeep Holla]

On 04/10/16 06:37, Venkatesh Vivekanandan wrote:
> On Mon, Oct 3, 2016 at 6:44 PM, Sudeep Holla <sudeep.holla at arm.com> wrote:
>> Hi Venkatesh,
>>
>> On 03/10/16 12:36, Venkatesh Vivekanandan wrote:
>>>
>>> Hi All,
>>>
>>> I am trying to collect ETF trace from Juno R1 and could see "cpu
>>> stall" while dumping the trace. Attached is the log of sequence
>>> followed. Was trying to collect the trace data from hardware and see
>>> if it is any valid data. Am I missing anything here?.
>>>
>>
>> There are few fixes from me and Suzuki queued for v4.9.
>> Can you check if this issue persists even on linux-next ?
>
> Issue is the same in linux-next as well. Please find the attached log.
>

OK, what do you mean by the issue still being present. I no longer see
any ETM failures or messages. Does the system hang when you try to read
/dev/<addr>.etf ?

Also the RCU stalls could be related to CPUIdle. Are you using latest
versions of trusted firmware ?

-- 
Regards,
Sudeep